light like electric light, nebular light.
it is only possible if that light contains photons that active that they are able to break down the chlorophyll molecules and can make them active.
Yes, plants are able to photosynthesize under all light. That means that if there is light for you to see, plants can photosynthesize there!
Yes, You can grow a plant using just light created from a bulb in your closet. So therefore, Yes. You do not need sunLIGHT to allow photosynthesis to happen
Yes, they can. The only difference between sunlight and other light all around us is the composition [ie the specific frequencies of photons combined in that ray of sunlight], and technically the plants use the energy, so due to E=hf, when the frequency is higher [eg sunlight, UV light] you get more energy, the plants thrive more, but any light is okay as long as the energy is not too low [or high] for the plants. That's why plants can grow from infrared light, but they don't thrive cos there's just too little.